12668403 has 8 divisors (see below), whose sum is σ = 18426816. Its totient is φ = 7677800.

The previous prime is 12668399. The next prime is 12668413. The reversal of 12668403 is 30486621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12668403 - 2² = 12668399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12668413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191913 + ... + 191978.

It is an arithmetic number, because the mean of its divisors is an integer number (2303352).

Almost surely, 2^12668403 is an apocalyptic number.

12668403 is a deficient number, since it is larger than the sum of its proper divisors (5758413).

12668403 is a wasteful number, since it uses less digits than its factorization.

12668403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383905.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12668403 is about 3559.2700094261. The cubic root of 12668403 is about 233.1170060773.

It can be divided in two parts, 1266 and 8403, that added together give a palindrome (9669).

The spelling of 12668403 in words is "twelve million, six hundred sixty-eight thousand, four hundred three".